That's still too much hassle. If they wanted us dead, it would be quieter and less messier if it was all taken care of somewhere... less fancy, while we were still asleep. Assassins shouldn't be squeamish anyway.

[Back to that mysterious door! Jeez, just what could be on the other side.]

There could be hidden doors elsewhere, old manors like these are notorious for their tricks. That this one's plain out in the open makes things stranger to me, personally.